Define Gap Based Refinement Criteria
Use the Gap tool to define mesh refinement settings based on gaps between surfaces.
- 
                Select the surfaces on which to apply the mesh
                    control in the following ways:
                - While in the Mesh ribbon, select two or more surfaces, then right-click and select from the context menu.
- From the Mesh ribbon, click the
                                Gap tool. 
 Figure 1.Select surfaces. 
 
- In the dialog, define gap refinement options.
- 
                From the guide bar, execute the command in the following
                    ways:
                - Click  to confirm your selection and remain in the
                            tool. to confirm your selection and remain in the
                            tool.This allows you to continue creating instances and helps you visualize and edit instances with the legend. 
- Click  to confirm your selection and exit the
                        tool. to confirm your selection and exit the
                        tool.
 
- Click